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Evaluación de métodos de propagación de Dioscorea spp. para aumentar la disponibilidad de semilla libre de enfermedades
(2019-05-15)
Yam (Dioscorea spp.) is the most economically important crop within the root and tuber in Puerto Rico. However, only 18 % of the local demand is currently produced on the island. The lack of high-quality disease-free ...
Respuesta del arroz (Oryza sativa) a la fertilización nitrogenada en suelos del Valle de Lajas
(2019)
El arroz es uno de los cultivos de grano de mayor importancia mundialmente. En Puerto Rico el arroz es parte de la fuente calórica consumida diariamente y en caso de que se produjera, el mejor manejo de nitrógeno (N) ...
Producción de maíz dulce con leguminosas de cobertura y efectos alelopáticos en cultivos agrónomicos
(2014)
Sustainable agriculture requires the integration of organic matter, crop rotation and association with legumes to reduce the use of inorganic fertilizer. Therefore, three studies were conducted to compare the effects of ...
Fertilizer-nitrogen and cover-crop rotation effects on inbred maize (Zea mays L.) yield and soil quality
(2019-02-05)
This thesis evaluates the effects of fertilizer-nitrogen (N) and cowpea (Vigna unguiculata (L.) Walp.) cover crop (CC) rotation on inbred maize production, microbial community structure and activity and soil quality. The ...
Formation of aggregates and storage of carbon mediated by earthworms in two soil series of Puerto Rico
(2019-06-03)
Earthworms play an important role in soil aggregate formation and carbon incorporation. However, there are no currently published reports of soil aggregate formation mediated by earthworms in the soils of Puerto Rico. This ...
Desarrollo de líneas de habichuela (Phaseolus vulgares L.) con resistencia al gorgojo común (Acanthoscelides obtectus Say)
(2012)
El gorgojo común (Acanthoscelides obtectus Say) es una plaga agresiva en la pos cosecha de habichuelas (Phaseolus vulgaris L). Esta plaga ataca la semilla almacenada, lo que reduce la germinación y la calidad comercial de ...
Severidad de huanglongbing (hlb) en genotipos de naranja [Citrus ×sinensis (L.) Osbeck], mandarina (Citrus reticulata Blanco) y limón [Citrus ×latifolia (yu.) Tanaka] en huertos
(2019-04-22)
The citrus disease known as Huanglongbing (HLB) was reported for the first time in Puerto Rico in 2009. Since then, it has spread throughout the island causing a decrease in production and reduction in the cultivated area, ...
Hongos de la carambola (Averrhoa carambola L.) en Puerto Rico
(2015)
Starfruit is an exotic fruit with great nutritional, medicinal and economic benefits. Reports suggest that pests and diseases reduce the quality and yield of this crop. In Puerto Rico, there is an interest to increase ...
Yield and quality performance of eleven open pollinated and three hybrid tomato cultivars grown under organic management in Lajas Puerto Rico
(2011)
Organic variety trials were conducted in 2010 and 2011 to evaluate 14 tomato (Solanum lycopersicum L.) cultivars at Lajas, Puerto Rico. Significant differences in marketable fruit yield were observed among cultivars in ...
Estudio de la herencia de los altos niveles de resistencia al tizòn bacteriano, causado por Xanthomonas axonopodis pv. phaseoli, en el frijol comùn (Phaseolus vulgaris L.)
(2013)
Common bacterial blight caused by the pathogen Xanthomonas axonopodis pv. phaseoli (Xap) is an important biotic factor limiting common bean (Phaseolus vulgaris L.) production. A few bean breeding lines such as VAX 6 exhibit ...